How I Met Your Mother Season 6 Episode 11 The Mermaid Theory
How I Met Your Mother Season 6 Episode 11 The Mermaid Theory
As Ted and Zoey test whether a guy and a married woman can be friends, he tries to befriend her husband as well. Marshall and Robin try hanging out alone. Barney and Lily have a spat.
Air Date: December 6, 2010
Episode Rating:
